Problems tested redundantly

[bobbicodes]

Upon execution the script now grabs the most recently modified file in order to find your place, eliminating the need to store it in a file.

Obviously it needs to test it to determine if it was indeed answered correctly. Otherwise that problem must be presented again.

Since the main loop is called every time a question is answered, that means every answer ends up being tested twice.

This will likely only be noticeable on the longer-running problems, but should be fixed nonetheless.

I can think of a few different ways to do it, but I'm getting fuzzy and should probably go to sleep. Just leaving this here so I don't forget.

[bobbicodes]

Seems like an obvious fix would be to simply not store the answer unless it passes. (derp)